I can second this recommendation, as it's a great game. Very single-player-minded, and developed by Mistwalker, which is the company started by the original brain behind the Final Fantasy series (and if you're familiar with obscure Wii games, the same company that did The Last Story).

Very fun, not very time consuming, and well worth checking out!

To throw my code in mix, just because: rEuJTdqFKEvZ

EDIT: To provide links and gameplay introductions, there are some videos on youtube and at their website (http://www.terra-battle.com/en/gamesystem.html) that give a good overview of the game and how to play it. I highly encourage you to take a look!